Electric-arc lamp



(No Model.)

P. S. GIEL.

-. ELECTRIC ARC LAMP.

N0. 279,934.- Patented June 26,1883.

l r n 1b VHD'L'OR F?" K ITNESSEYS:

4p. ATTORNEYS UNITED STATES PATENT OFFICE.

FRANZ S. GIEL, OF BROOKLYN, ASSIGNOR OF ONE-HALF TO JOSEPH LEDERLE, OF TOMPKINSVILLE, NET" YORK.

ELECTRIC-FARO LAMP.

SPECIFICATION formingpartof Letters Patent N0. 279,934, dated June 26, 1883. Application filed Octoherfii, 1882. (N'nniodeh) To all whom it may concern Be it known that I, FRANZ S. GIEL, of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Electric Lamp, of which the following is a specification.

Figure 1 represents a side view,partly in section, of my improved electric lamp. Fig. 2 is a horizontal section on the line 0 0, Fig.1. Fig. 3 is a bottom View, partly in section, of the upper portion of the lamp. Figs. 4, 5, 6, 7 and 8 are detail views of the parts of the lamp, hereinafter more fully referred to.

The object of this invention is to produce an electric lamp in which the movable carbon, rests on a fixed carbon before the power of the electric current is brought into play, and in which, when the current exceeds its proper strength, the upper carbon will be raised farther away from the lower, so as to PIGWBIH] the sudden enlargement of the flame and other irregularities in the appearance of the flame which would result if the carbons should maintain their relative positions during all the variations of the current. This adjustment of the upper carbon is necessarily automatic, and is in the example which has been illustrated in the drawings produced by interposing between the carbon and a surrounding electro-magnet an iron core-clamp, which, when raised by the action of the electro-magnet, will clamp the carbon and lift it away from the lower carbon. The further elevation of the iron clamping core is produced whenever the current which travels through the electro-magnet exceeds its normal limit.

The invention consists of the devices here part of the framing B has a ferrule, O, which is split, being made in two parts, each part being affixed to the framing B, as shown more clearly in Fig. 6, and which has a threaded. conical portion, a, around which is fitted anut, D, matching its thread. Whenever this nut D is screwed up over the larger part of the cone (1, the split'ferrule C is clamped to firmly grasp and hol d the lower carbon, E. For moving the lower carbon, E, upwardly or removing it for replacement, the split ferrule is partly opened by lowering the nut D until it rests on a shoulder, b', at the lower part of the ferrule, and thus allows the free adjustment of the lower carbon, E, in the ferrule or the butting in of a new carbon. The upper carbon, F, stands vertically on the lower carbon, E, and passes through the electro-magnet A axially, its upper portion being guided in a sleeve, G, which is supported on the frame-B, as shown.

\Vithin the electro-magnet is interposed, be-- tween the same and the carbon F, the iron carbon-clamp H, which is more clearly illustrated in Fig. 5, and which consists of two semicylindrical shells that are adapted to fit the inner 1 bore of the electro-magnet, and to receive the carbon F, and that are tapered beneath a shoulder, j, at their lower parts, as shown at d. It is essential that the two parts of the clamp H, although they are laterally adjustable with reference to one another, should, when moved vertically, move simultaneously, and to this end dowels or pins 6 project from one of these halves into sockets or mortises in the other half, as indicated in Fig. 4, which is a top "iew of the clamp H. The clamp H is of iron, and so magnetized by the inductive action of the electro -magnet Athat its poles should bethe reverse of those in the electro-niagnetthat is to say, in the iron body of the electro-magnet A the posi tive pole shall be at the upperend and the negative pole at the lower end, whereas in the core clamp H. the positive pole shall be at the lower end and the negative pole at the upper end. The ends of the clamp H are united by links f with springs 9, that are secured in the frame B, and when the clamp H is lifted these links and springs act to push the two parts of the clamp toward one another, and thus to cause the clamp to grasp the carbon F and lift it too. The power of the springs y can be regulated by suitable screws, h. Below the electromagnet, and around the conical portion (1 of the carbon-clan1p H, is placed an iron ring, I,

which is suspended by the heads of three (more or less) guide-screws, z, that are secured in the electro magnet. This ring fits under the shoulder j, which separates the conical from the cylindrical. portion of the clamp H.

The operation of the lamp is as follows! During the normal power of the current for producing a certain light the upper carbon will be held slightly above the lower carbon, and the carbon-clamp H will be nearly dropped upon the ring I; but when the power of the current is unduly increased the ring I will be attracted by the lower part of the electro magnet, so to lift the carbon-clamp H, and the latter will also be lifted by the action of the powerful current in the electromagnet, and the links 1" will then be caused to push the two halves of the carboirclamp H tightly against the carbon F, so that the latter will. be lifted with the clamp H, and the points of the carbons E F thus be further separated while the too powerful current lasts. \Vhen the power of the current becomes normal again, the attraction whichlifted the clamp H ceases,- and the same drops by its own weight into the normal position, thereby carrying the carbon 1* back to its normal position.

I deem it an important feature of my invention to automaticallymove one of the carbons awaj from the other under the influence of a too powerful current, and in this connection I deem it proper also to state that the invention is applicable to the adjustment of either the upper or the lower carbon, the modifications necessary for moving the lower carbon away from the upper,instead o f the upper away from the lower, requiring no other specifications to one who is skilled in the art of male ing electric lamps.

1. in an electric lamp having two carbons,

E F, the combination of the electromagnet- A, having iron body, with an interposed magnetized annular carbon-clamp, H, made of and frame B, the clamp being the core of the electro-magnet, substantially as specified.

3. The combination of the electro-magnet A with. the carbon-clamp H, ring I, and links f, substantially as and for the 1iurpose speci fied.

4. In an electric lamp, the combination of the split ferrule 0, each part whereof is fixed to the frame B, and having conical threaded portion a and shoulder b, with the movable emlnracing-nut D, threaded conically, and wit h the carbon E, substantially as described.

The combination of an electro-magnet with the inner core, which is split throughout its length, and with an outer stationz'rry frame, to which the two parts of the split core are connected, for the purpose of producing vertical motion of the core, and also horizontal motion of its two equal parts by the current that traverses the electro-magnet, substant la] 1 y as described.

FRANZ b. (iIIGIJ.

\Vit nesses:

\VILLIAM ll. (1. Silvia-1,. \VIIJJY G. E. Scum/m. 

